no1wudi commented on a change in pull request #5192:
URL: https://github.com/apache/incubator-nuttx/pull/5192#discussion_r780760601
##########
File path: arch/risc-v/src/common/riscv_swint.c
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@@ -116,6 +134,26 @@ static void dispatch_syscall(void)
" ecall" /* Return from the syscall */
);
}
+#else
+static void dispatch_syscall(void)
+{
+ asm volatile
+ (
+ " addi sp, sp, -4\n" /* Create a stack frame to hold ra */
Review comment:
Not only 4 or 8 but load/store instruction should also different (sd/ld
vs sw/lw)
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